Revision 9757810488e595638996e7b84dace5787733e9c6 authored by 1p on 18 April 2014, 01:54:37 UTC, committed by 1p on 18 April 2014, 01:54:37 UTC
1 parent fa07825
greenscreen.c
/**
* This is AJ's 5D2 code ported to MagicLantern
*
* Copyright (C) 2011 AJ_NEWMAN - AJ's green screen routine library for the 5D2
*/
#include <math.h>
#include <dryos.h>
#include <bmp.h>
#include <propvalues.h>
#include <greenscreen.h>
static unsigned int last_green_screen_state = 0;
void green_screen_step()
{
/****************************************************
* .. if Canon menu is ACTIVE - return immediately *
****************************************************/
if (!lv)
{
last_green_screen_state = 0;
return;
}
/********************************
* Masses of auto variables. *
********************************/
// unsigned int Xs,Xe; // X_POSITION of Cropmark_start/_end
//~ Xs = g_cropmark_x_start; // First Pix drawn on (and a multiple of 4)
//~ Xe = g_cropmark_x_end; // First Pix not drawn on (multiple of 4)
// unsigned int Vram_pixels = Xe - Xs;
unsigned int vpix, lum1, lum2;
// results from previous loop, used for display
static int total_luma = 0;
static int highest_luma = 0;
static int lowest_luma = 256;
static int total_pixels = 0;
// results for current loop, being updated (will be used at next loop)
unsigned int total_luma_tmp = 0;
unsigned int highest_luma_tmp = 0;
unsigned int lowest_luma_tmp = 256;
unsigned int total_pixels_tmp = 0;
/****************************************************************
* Set address pointers up to first line in Vram *
****************************************************************/
uint32_t* lv = (uint32_t *) get_yuv422_vram()->vram;
uint8_t* bm = bmp_vram();
// uint16_t* bm16 = (uint16_t *) bmp_vram();
uint8_t* bm_mirror = (uint8_t *) get_bvram_mirror();
unsigned int average_luma = total_luma / total_pixels;
unsigned int high_delta = highest_luma - average_luma; // used to work out colour scale
unsigned int low_delta = average_luma - lowest_luma; // colour scale for darker pixels
/******************************************************************
* Go through Crop area. Note highest and lowest luma, average *
******************************************************************/
int high_delta_factor = 1024 / high_delta; // replace division with multiplication
int low_delta_factor = 1024 / low_delta;
for(int y = os.y0 + os.off_169; y < os.y_max - os.off_169; y += 2 )
{
uint32_t * const v_row = (uint32_t*)( lv + BM2LV_R(y) ); // 2 pixels
uint16_t * const b_row = (uint16_t*)( bm + BM_R(y) ); // 2 pixels
uint16_t * const m_row = (uint16_t*)( bm_mirror + BM_R(y) ); // 2 pixels
uint8_t* lvp; // that's a moving pointer through lv vram
uint16_t* bp; // through bmp vram
uint16_t* mp; // through mirror
for (int x = os.x0; x < os.x_max; x += 2)
{
lvp = (uint8_t *) (v_row + BM2LV_X(x)/2); lvp++;
bp = b_row + x/2;
mp = m_row + x/2;
/********************************************
* Get 4 bytes of vram (ie two vram Pixels) *
********************************************/
// vpix = [LSB=pix on left] u y1 v y2 [MSB=pix on right]
vpix = lv[BM2LV(x,y)/4];
total_pixels_tmp += 2;
lum1 = ( vpix & 0x0000FF00 ) >> 8; // y1
lum2 = ( vpix & 0xFF000000 ) >> 24; // y2
/*************************
* Update total luma *
*************************/
total_luma_tmp += lum1 + lum2;
/*************************
* new Maximum ? *
*************************/
if (lum1 > highest_luma_tmp)
highest_luma_tmp = lum1;
if (lum2 > highest_luma_tmp)
highest_luma_tmp = lum2;
/*************************
* new Miniumum ? *
*************************/
if (lum1 < lowest_luma_tmp)
lowest_luma_tmp = lum1;
if (lum2 < lowest_luma_tmp)
lowest_luma_tmp = lum2;
/*********************************************************
* Initialise writeback colour of overlay to 0 for LUM1 *
*********************************************************/
unsigned int lum = (lum1 + lum2) / 2;
unsigned int col = 0;
/**************************************
* LUM1 Higher than average luma *
**************************************/
if (lum > average_luma)
{
col = ((lum-average_luma)*12) * high_delta_factor / 1024;
if (col > 12)
col=12;
col = 128 + (col+2) * 8;
}
else if (lum < average_luma)
{
/**************************************
* LUM1 Lower than average luma *
**************************************/
col = ((average_luma-lum)*12) * low_delta_factor / 1024;
if (col > 12)
col=12;
col = 128 - (col+2) * 8;
}
if (col) col = ((col * 41) >> 8) + 38;
unsigned int c = col | (col << 8);
#define BP (*bp)
#define MP (*mp)
#define BN (*(bp + BMPPITCH/2))
#define MN (*(mp + BMPPITCH/2))
if (BP != 0 && BP != MP) { continue; }
if (BN != 0 && BN != MN) { continue; }
if ((MP & 0x80808080) || (MN & 0x80808080)) continue;
MP = BP = c;
MN = BN = c;
#undef BP
#undef MP
#undef BN
#undef MN
}
} // end of (y loop)
/**********************************
* commit statistics for next loop *
**********************************/
total_luma = total_luma_tmp;
highest_luma = highest_luma_tmp;
lowest_luma = lowest_luma_tmp;
total_pixels = total_pixels_tmp;
/**********************************
* Display average, min and max *
**********************************/
bmp_printf( FONT(FONT_MED, COLOR_WHITE, COLOR_BLACK),
os.x0 + os.x_ex/2 - font_med.width*7, os.y_max - os.off_169 - 47,
"Average = %03d",average_luma);
bmp_printf( FONT(FONT_MED,COLOR_CYAN, COLOR_BLACK),
os.x0, os.y_max - os.off_169 - 47,
"MIN = %03d",lowest_luma);
bmp_printf( FONT(FONT_MED,COLOR_YELLOW, COLOR_BLACK),
os.x_max - font_med.width*9,
os.y_max - os.off_169 - 47,
"%03d = MAX",highest_luma);
bmp_printf( FONT(FONT_MED,COLOR_WHITE, COLOR_BLACK),
os.x0 + os.x_ex/2 - font_med.width*7, os.y_max - os.off_169 - 27,
"Accuracy=%03d%%",((255-(highest_luma-lowest_luma))*99 )/255
);
bmp_printf( FONT(FONT_MED,COLOR_CYAN, COLOR_BLACK),
os.x0, os.y_max - os.off_169 - 27,
"delta %03d", COERCE(average_luma - lowest_luma, 0, 255));
bmp_printf( FONT(FONT_MED, COLOR_YELLOW, COLOR_BLACK),
os.x_max - font_med.width*9,
os.y_max - os.off_169 - 27,
"%03d delta", COERCE(highest_luma - average_luma, 0, 255));
msleep(10); // don't kill the battery :)
} /* end of green_screen_step() */
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